Write any two errors of systematic errors. Explain them.

Explanation

`(i)` Instrumental errors : It arises when an instrument is not calibrated properly at the time of manufacturer. It can be corrected by choosing accurate instruments.
`(ii)` Personal errors : These errors are due to individuals performing the experiment, may be due to incorrect initial setting up of the experiment or carelessness of the individual making the observation due to improper precautions.